At a light 4.5oz, the F-4, represent a pivotal advancement in 9mm PCC suppressor technology. The F-4 is designed with dedication in mind. Built from 100% Grade 5 Titanium and circumference welded for maximum strength. Perfect for plug and play on any pistol caliber carbine, the F-4 utilize a flush direct-thread mount on the barrels shoulder for an all-muzzle-forward design.